package utils;

import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.PopupWindow;
import android.widget.TextView;

import com.example.administrator.newxlmedical.InventoryActivity;
import com.example.administrator.newxlmedical.R;

/**
 * Created by popfisher on 2016/8/19.
 */

public class PopupWindowUtil {
    /**
     * 计算出来的位置，y方向就在anchorView的上面和下面对齐显示，x方向就是与屏幕右边对齐显示
     * 如果anchorView的位置有变化，就可以适当自己额外加入偏移来修正
     * @param anchorView  呼出window的view
     * @param contentView   window的内容布局
     * @return window显示的左上角的xOff,yOff坐标
     */
    public static int[] calculatePopWindowPos(final View anchorView, final View contentView) {
        final int windowPos[] = new int[2];
        final int anchorLoc[] = new int[2];
        // 获取锚点View在屏幕上的左上角坐标位置
        anchorView.getLocationOnScreen(anchorLoc);
        final int anchorHeight = anchorView.getHeight();
        // 获取屏幕的高宽
        final int screenHeight = ScreenUtils.getScreenHeight(anchorView.getContext());
        final int screenWidth = ScreenUtils.getScreenWidth(anchorView.getContext());
        // 测量contentView
        contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
        // 计算contentView的高宽
        final int windowHeight = contentView.getMeasuredHeight();
        final int windowWidth = contentView.getMeasuredWidth();
        // 判断需要向上弹出还是向下弹出显示
        final boolean isNeedShowUp = (screenHeight - anchorLoc[1] - anchorHeight < windowHeight);
//        if (isNeedShowUp) {
            windowPos[0] = windowWidth;
            windowPos[1] = anchorLoc[1] - windowHeight;
////        } else {
//            windowPos[0] = screenWidth - windowWidth;
//            windowPos[1] = anchorLoc[1] + anchorHeight;
////        }
        return windowPos;
    }

    public static PopupWindow showPopupWindow(View anchorView, String content, int xOffWidth, Context context) {
        View contentView = LayoutInflater.from(context).inflate(R.layout.pupwindow_content,null);
        TextView textView = (TextView) contentView.findViewById(R.id.tv_pupwindow_content);
        textView.setText(content);
        PopupWindow popupWindow = new PopupWindow(contentView,
                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
        // 如果不设置PopupWindow的背景，有些版本就会出现一个问题：无论是点击外部区域还是Back键都无法dismiss弹框
        popupWindow.setBackgroundDrawable(new ColorDrawable());
        // 设置好参数之后再show
        int windowPos[] = PopupWindowUtil.calculatePopWindowPos(anchorView, contentView);
//        int xOff = xOffWidth; // 可以自己调整偏移
//        windowPos[0] -= xOff;
        popupWindow.showAtLocation(anchorView, Gravity.TOP | Gravity.START, xOffWidth, windowPos[1]);
        return popupWindow;
    }
}
